New fiberglass hood: Has anyone ever had success with flat black rattle cans?

I am waiting to paint my new glass hood. The manufacturer said to wait at least 30 days before paint. I am no painter but plan on getting a cheap sprayer from harbor freight 1 for primer and 1 for paint. Was told by a Mopar restoration shop painter to hang the hood up and paint it don’t lay it flat. I plan on using Hot Rod Black. You go 1st